package com.lzj.Spring_second.test3;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


@Service("bookStoreServiceImpl")
public class BookStoreServiceImpl implements BookStoreService {
//    自动注入DAO(接口注入)
    @Autowired
    private BookStore bookStoreImpl;
//    添加事物注解
    @Transactional
    @Override
    public void purchaseBook(String userName,String bookName) {
//        查看购买书的价格
        int price = bookStoreImpl.getBookByName(bookName);
//        更新库存
        bookStoreImpl.updateBookStore(bookName);
//        更新客户的钱
        bookStoreImpl.updateCustomerMoney(userName, price);
    }

}

    <!-- 配置自动扫描包 -->
    <context:component-scan base-package="com.lzj.Spring_second.test3"></context:component-scan>
    <!-- 引入外部数据 -->
    <context:property-placeholder location="classpath:com/lzj/Spring_second/test3/config/data.properties"/>
    <!-- 通过数据源连接数据库 -->
    <bean id="sqlConnctionDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="user" value="${user}"></property>
        <property name="password" value="${password}"></property>
        <property name="driverClass" value="${driverClass}"></property>
        <property name="jdbcUrl" value="${jdbcUrl}"></property>
    </bean>
    <!-- 配置事物管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="sqlConnctionDataSource"></property>
    </bean>
    <!-- 启用事物管理器注解 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>